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Multiple firing stroke surgical instrument incorporating electroactive polymer anti-backup mechanism

a multi-fired stroke, surgical instrument technology, applied in the direction of surgical staples, surgical forceps, paper/cardboard containers, etc., can solve the problems of binding or other malfunction, long and narrow instruments used in such procedures, etc., to prevent inadvertent retraction of firing components

Inactive Publication Date: 2009-04-07
CILAG GMBH INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012]The invention overcomes the above-noted and other deficiencies of the prior art by providing a surgical stapling and severing instrument that advantageously incorporates a multiple firing stroke handle that actuates a long end effector without undue manual force required by the surgeon. A retraction bias on firing components assists in retracting a firing mechanism after full firing travel. Advantageously, an electrical actuator assists in preventing inadvertent retraction of firing components between firing strokes.

Problems solved by technology

Moreover, laparoscopic and endoscopic procedures often require the surgeon to act on organs, tissues and / or vessels far removed from the incision.
Thus, instruments used in such procedures are typically long and narrow while being functionally controllable from a proximal end of the instrument.
In addition, some surgeons, not familiar with the larger staple cartridges, may become concerned that binding or other malfunction may occur when an unexpectedly higher force is required.

Method used

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  • Multiple firing stroke surgical instrument incorporating electroactive polymer anti-backup mechanism
  • Multiple firing stroke surgical instrument incorporating electroactive polymer anti-backup mechanism
  • Multiple firing stroke surgical instrument incorporating electroactive polymer anti-backup mechanism

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Embodiment Construction

[0033]In FIG. 1, a surgical device suitable for endoscopic and laparoscopic use is depicted that advantageously combines a multiple firing stroke, automatic retraction of firing components, and an advantageously electrically actuated anti-backup mechanism consistent with the present invention to prevent inadvertent retraction between firing strokes. In FIGS. 2-3, 3A a version of the anti-backup mechanism of FIG. 1 is depicted. In particular, an electrical-mechanical (hybrid) anti-backup mechanism modifies the wholly mechanical implementation described in more detail in the afore-mentioned U.S. patent application Ser. Nos. 11 / 052,387 and 11 / 052,632, both of which more fully explain closure and firing operations of the handle common to the illustrative versions herein. In FIGS. 4-6, a version of the electrically actuated anti-backup mechanism further omits the mechanical portions for the mechanical end of firing travel and manual release of an anti-backup mechanism, relying solely upo...

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Abstract

A surgical stapling and severing instrument particularly suited to endoscopic procedures incorporates a handle that produces separate closing and firing motions to actuate an end effector. In particular, the handle produces multiple firing strokes in order to reduce the required amount of force required to fire (i.e., staple and sever) the end effector. A firing member reciprocates within an elongate shaft to the end effector to transfer this firing motion. A retraction spring retracts the firing member after full firing. Between firing strokes as the firing trigger is released, an anti-backup mechanism activates an electrical actuator (e.g., elecroactive polymer actuator) that is physically grounded to the handle to bind the firing member preventing inadvertent retraction.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of U.S. provisional application Ser. No. 60 / 591,694, entitled “SURGICAL INSTRUMENT INCORPORATING AN ELECTRICALLY ACTUATED ARTICULATION MECHANISM” to Shelton IV, filed 28 Jul. 2004.FIELD OF THE INVENTION[0002]The present invention relates in general to surgical stapler instruments that are capable of applying lines of staples to tissue while cutting the tissue between those staple lines and, more particularly, to improvements relating to stapler instruments and improvements in processes for forming various components of such stapler instruments that preclude inadvertent firing.BACKGROUND OF THE INVENTION[0003]Endoscopic and laparoscopic surgical instruments are often preferred over traditional open surgical devices since a smaller incision tends to reduce the post-operative recovery time and complications. The use of laparoscopic and endoscopic surgical procedures has been relatively popular and has prov...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): A61B17/04
CPCA61B17/07207A61B17/2909A61B2017/00398A61B2017/00407A61B2017/00871A61B17/072A61B17/068
Inventor SHELTON, IV, FREDERICK E.WALES, KENNETH S.
Owner CILAG GMBH INT
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